155812433 has 4 divisors (see below), whose sum is σ = 178071360. Its totient is φ = 133553508.

The previous prime is 155812427. The next prime is 155812457. The reversal of 155812433 is 334218551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 334218551 = 47 ⋅7111033.

It is a cyclic number.

It is not a de Polignac number, because 155812433 - 2¹⁶ = 155746897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155812433.

It is not an unprimeable number, because it can be changed into a prime (155812493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11129453 + ... + 11129466.

It is an arithmetic number, because the mean of its divisors is an integer number (44517840).

Almost surely, 2^155812433 is an apocalyptic number.

It is an amenable number.

155812433 is a deficient number, since it is larger than the sum of its proper divisors (22258927).

155812433 is an equidigital number, since it uses as much as digits as its factorization.

155812433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22258926.

The product of its digits is 14400, while the sum is 32.

The square root of 155812433 is about 12482.4850490597. The cubic root of 155812433 is about 538.1054240319.

The spelling of 155812433 in words is "one hundred fifty-five million, eight hundred twelve thousand, four hundred thirty-three".